Of course the correct way to promounce Golucester from the original is with a really bad south west english accent. SO think like a Pirate (the Piratical Aaaaaaar comes from that area) and repeat

GLAAAAR-STIRGLAAAAR-STIRGLAAAAR-STIR

Also for those about to visit the UK...

Leicester is pronounced "LESS-ster"Worcester is pronounced "WOO-ster"Southwell in Nottinghamshire is pronounced "SUTH-ALL"and Derby is pronounced "Away in a manger no crib for a bed, the little lord Jesus looked up and he said, We hate DAR-bee and We hate DAR-bee. We hate DAR-bee and We hate DAR-bee. We hate DAR-bee and We hate DAR-bee, We are the DAR-bee haters, sheep sheep sheepshaggers AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"

Not by people who come from it. I met one yesterday. You ignorant sod, Card.